accident angles broken clearing damage damaged danger dangerous dangling electricity elevation equipment external height heights high insulators machinery on-high perspectives power power-lines power-pole repair-crew repairing repairs risks risky safety snapped surface surfaces up-high work workman workmen blade brick-cutter bricks circular circular-saw cutting dampen Dirt dirty dust ear-protection electrical machine noise Noisy pavers paving powerful protected protection protective safety-equipment safety-gear water wet working arm digger elevated hydraulics lifting post-hole-digger raised raising replacement replacing service spiraling spiralling trucks vehicles overturned replace snapped-off-pole-part trailer basket cherry-picker cleaning extension Harness raised-platform safety-harness washing advice advising alert attached bolted communicating communication concern cracked cracks electric-power electricity-supply energy high-voltage information informing metal power-supply red security shadows sign signage supply symbol symbolic voltage volts warning warning-sign white wording cable electric electro elevator engine engines industrial industry lift mechanic motor orange pressure steel technical technology tool vehicle yellow connecting connections